Pi Day, not to be confused with Pie Day held in January, is a day with deals on pizza, pastry and pot pies.

Aside from calculating your savings, it's a day to have fun with math too, said Syracuse University mathematics professor Graham Leuschke. He said you can search for your birthday in the digits of π and can create a "pi-ku" similar to a haiku poem.

PiDay.org, which calls itself the official site for Pi Day, has additional ideas for activities to celebrate the day.

Pi Day pizza deals

Here are the deals available at participating locations Thursday unless otherwise noted. To be on the safe side, always check with your closest location before heading out. Also, some will require you to have a restaurant's app or be signed up for emails.

&Pizza: The company, which calls itself "an anti-establishment establishment," is holding weddings at four of its locations Thursday for selected couples and is offering a discount through Uber Eats Wednesday through Sunday. With promo code PIDAY19, get $3.14 off all &pizza and Uber Eats deliveries.

: The chain’s smartphone app is needed to get the $3.14 Pi Day deal Thursday on custom pizzas. One per order and in-restaurant only.

Cicis: Buy one adult buffet and large drink Thursday and get a second adult buffet for $3.14 with a coupon.

Domino’s: Not specific for Pi Day but through April 28, Domino’s is giving Piece of the Pie Rewards members an easy way to earn points that can redeemed for a free Domino's pizza – no matter what brand's pizza they buy. The latest version of Domino’s mobile app is needed to "to scan a pizza or an eligible image of a pizza.” Learn more at www.pointsforpies.com.

Fired Pie: From 2 p.m. to close Thursday, get any one-topping pizza for $3.14 with purchase of a drink. Limit one per person and not valid on third-party delivery services.

Fresh Brothers: Get any personal pizza for $3.14 Thursday for pick up, dine-in and delivery with promo code PIDAY on Thursday, March 14. Not valid with third-party services.

Hungry Howie's: Through Thursday, with the purchase of any Howie Bread at regular menu price, get a medium one-topping pizza for $3.14 with promo code 19PI. Carry out orders only. Florida locations are not participating in this promotion.

Jet's Pizza: Buy a large pizza at regular price Thursday and get a medium one-topping round pizza for

Mountain Mike’s Pizza: Get $5 off any Mountain-sized pizza with code 079984, or $3 off any large pizza Thursday with promo code 317445.

Pie Five Pizza: Get any 11-inch Signature Pizza for $3.14 Thursday. Limit one pizza per person and in-store only. No topping modifications allowed and there will be an additional charge for cauliflower crust, gluten-free crust and vegan cheese.

Pieology: Buy one Artisan Thin Pizza, get a second for $3.14 Thursday. Plus, Pie Life Rewards members making a purchase on Pi Day will get $2 off their next order. The chain also is holding the "Perfect Pieology Pull” cheese-pull contest. “Customers simply visit the nearest Pieology, roll up their sleeves, start pulling, and documenting their best efforts," the company said in a statement. "After submitting their photo or video posts on Instagram using the hashtag, #perfectpieologypull, the public will vote on the top five entries and the best ‘pull’ will be named champion and receive a $50 Pieology gift card.” Enter by midnight Thursday.

Your Pie: The fast-casual pizza brand will have $3.14 pizzas at participating locations. In-store only, while supplies last. Additional pizzas or menu items may be purchased at full price. Stores also will offer games, bounce-back deals, prizes and giveaways throughout the day. Learn more at www.yourpie.com/pieday.

Other Pi Day deals

Bakers Square: Get $2 off any whole pie Wednesday or Thursday and double-crust fruit pies also will be baked with the pi symbol. Excludes cheesecake and carrot cake. Only valid when ordered in-restaurant and while supplies last.

California Tortilla: The fast-casual Mexican chain is celebrating St. Patrick’s Day Thursday. Get a free order of chips and queso with any purchase when you say “Pot o’ Gold” when placing your order. In-store only and cannot be combined with any other offer.

Cheddar’s Scratch Kitchen: Order the restaurant’s Homemade Chicken Pot Pie for dining in or to-go Thursday and get a free second pie to bake at home. No coupon needed, and Cheddar’s says it will provide the baking instructions. Learn more at www.cheddars.com/pieday.

Fresh Market: Get $3.14 off Old Fashioned Apple and Cherry Pies along with Chicken Pot Pies from the deli Thursday.

Kroger: Select pies are $3.14 for Pi Day including apple, cherry, peach and pumpkin pies.

Marie Callender's: Get a free slice of pie Thursday with purchase of a full-price adult menu and a coupon posted at www.mariecallenders.com/coupon-piday. Not valid with other promotions including Kids Eat Free, happy hour menu, lunch combos and daily dish specials.

Schlotzsky’s: The fast-casual chain is celebrating National Potato Chip Day Thursday. Get a free bag of potato chips with entrée purchase.

Guy at work brings in 'cup-pies" every 3-14.
Little 2 or 3 bite pies like cupcakes for the people that don't like cake (me).
This year lineup is blueberry, peanut butter,and orange.

He always has an elaborate email that gets blasted to invite people to partake in the goodies - funny stuff!

"Is a low body mass causing your personal gravitational field strength to be low? Is this increasing your risk of hurtling off the Earth into the cold, empty void of space? Does a feeling of "not good" on your taste buds leave the rest of you feeling "not good" as well?

If so, ask your health care professional if pie is right for you.

A randomized double-blind crossover trial showed that pie increased the level of "fat and happy" by ever so much vs patients treated with doughnuts. A twist in the study simultaneously uncovered significant corruption and malfeasance within the administration of said doughnuts. See the Cruller Investigation published in JAMA.

Don't take pie if you're allergic to pie. Just stand next to the pies, looking sad and hate-filled, stink-eyeing the pie eaters whilst munching dry dandelion greens and angrily muttering to yourself 'This is just as good.'*

Side effects of pie may include nausea, upset stomach, diarrhea, incontinence, continence, intermittent glitter farting, dizziness, dry mouth, blurry vision, that thing after you poop where you wipe and you wipe and you wipe and it just never stops and it's like you're wiping a brown marker, headache, muscle aches, hives , bees, geriatric profanity disorder (or GPD), supplemental neck, and irrational contentment."